JP6105602B2 - Array substrate for display device, color filter substrate, and manufacturing method thereof - Google Patents

Description

  The present invention relates to an array substrate of a liquid crystal display (LCD), a color filter substrate, and a manufacturing method thereof.

  In flat panel display technology, LCDs occupy a major position in the current flat panel display market due to features such as small volume, low power consumption, radiationless and relatively low manufacturing cost.

  Advanced Super Dimension Switch (ADS) forms a multidimensional electric field in the same plane by the electric field generated around the slit electrode and the electric field formed between the slit electrode layer and the plate electrode layer. In addition, all the alignment liquid crystal molecules between the slit electrodes in the liquid crystal cell and immediately above the electrodes can be rotated, thereby improving the work efficiency and light transmission efficiency of the liquid crystal. Advanced super dimension switch technology can improve the screen quality of TFT-LCD products, with high resolution, high transmittance, low power consumption, wide viewing angle, high aperture ratio, low color difference, and push Mura (push Mura). It has excellent points such as no.

  In the current ADS mode liquid crystal display, the common electrode and the pixel electrode are made of a transparent conductor, thereby increasing the aperture ratio and the light transmittance. The space between the common electrode and the pixel electrode is narrower than the space between the upper substrate and the lower substrate. Therefore, the liquid crystal molecules are arranged on a plane parallel to the substrate by a multidimensional electric field formed between the common electrode and the pixel electrode. Rotating, thereby increasing the light transmission efficiency of the liquid crystal layer.

  In order to avoid the influence on the aperture ratio of the light-shielding area above the data line and increase the transmittance of the pixel, the conventional technique has provided a pixel structure as shown in FIG. Here, the light shielding area above the data line 1 is removed, and a slit-shaped common electrode 2 parallel to the data line 1 is provided. A part of the slit-like common electrode 2 is provided above the pixel electrode 3, the other part of the slit-like common electrode 2 covers the upper side of the data line 1, and the width of the common electrode 2 is larger than the width of the data line 1. wide. By forming the common electrode 2 above the data line 1, interference with the liquid crystal electric field of the data line 1 is suppressed and adverse effects such as light leakage are prevented, thereby increasing the transmittance of the pixel.

  However, the inventor found in the study: That is, the common electrode above the data line in the pixel structure is relatively wide, and there is still a loss in the transmittance at the position of the data line.

  One of the technical problems to be solved by the present invention is to provide an array substrate of a kind of display device, a color filter substrate, and a manufacturing method thereof. This effectively avoids interference with the adjustment of the liquid crystal above the data line signal and improves light transmission.

  In one aspect, the present invention provides an array substrate, and the array substrate includes the following: a base substrate, a gate line installed on the base substrate, a data line installed perpendicular to the gate line, and the gate line And a pixel area defined by intersecting the data lines, and a thin film transistor, a pixel electrode, and a common electrode that forms a multi-dimensional electric field in combination with the pixel electrode are provided in the pixel area, wherein the pixel electrode Is a slit electrode and the common electrode is a plate electrode, or the pixel electrode is a plate electrode and the common electrode is a slit electrode, and a first insulation is provided between the common electrode and the pixel electrode. A layer is provided, one end of the plate electrode covers the upper side of the data line, the layer in which the plate electrode is located, and the data Between the layers line is located, the second insulating layer is provided.

  For example, the second insulating layer is a resin layer made of resin.

  For example, the slits of the slit electrode are arranged at equal intervals.

In another aspect, the present invention provides a method for manufacturing an array substrate, which includes the following:
Forming a gate line, a data line, and a thin film transistor on a base substrate, the gate electrode of the thin film transistor being connected to the gate line, and the source electrode and the data line being connected;
Forming a second insulating layer on the base substrate on which the gate line, the data line, and the thin film transistor are formed;
Forming a plate-like electrode on the base substrate on which the second insulating layer is formed;
On the base substrate on which the plate electrode is formed, a slit electrode that forms a multi-dimensional electric field is formed in combination with the plate electrode, and a first insulating layer is provided between the slit electrode and the plate electrode. The slit electrode is a pixel electrode, the plate electrode is a common electrode, or the plate electrode is a pixel electrode, and the slit electrode is a common electrode. One end of the plate-like electrode covers the data line.

  For example, the second insulating layer is a resin layer made of resin.

  For example, the slits of the slit electrode are arranged at equal intervals.

  In another aspect, the present invention provides a color filter substrate, comprising: a base substrate, a black matrix, and a color resin formed between the black matrix, wherein the black matrix includes gate lines of the array substrate, thin film transistors, And a position where a data line between adjacent pixels is not provided.

  In another aspect, the present invention provides a display device, which includes the array substrate.

  In the technical configuration of the present invention, one end of the plate electrode covers the upper side of the data line, and a second insulating layer is provided between the layer with the plate electrode and the layer with the data line, and is used for insulation protection. . The configuration of the present invention not only suppresses interference with the adjustment of the liquid crystal above the data line, but also widens the formation range of the multi-dimensional electric field, thereby improving the adjustment range of the liquid crystal in the pixel and further improving the transmittance. I let you.

  In order to more clearly explain the technical configuration of the present invention, the drawings of the embodiments are briefly introduced below. As will be apparent, the drawings described below relate to some embodiments of the present invention and do not limit the present invention.

It is a cross-sectional structure schematic diagram of the array substrate in a prior art. It is a cross-sectional structure schematic diagram of the array substrate in the Example of this invention. It is a cross-sectional structure schematic diagram of the liquid crystal panel in the Example of this invention.

  In order to more clearly describe the objects, technical configurations and merits of the present invention, the technical configurations of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. Apparently, the described embodiments are some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention described, other embodiments that can be obtained on the premise that a person skilled in the art does not require creative labor also belong to the protection scope of the present invention.

  Embodiments of the present invention provide an array substrate, a color filter substrate and a manufacturing method of a display device, effectively avoiding interference with adjustment of liquid crystal above the data line signal, and improving light transmittance. .

  The array substrate according to an embodiment of the present invention includes a plurality of gate lines and a plurality of data lines. The gate lines and the data lines intersect with each other to define pixel areas arranged in a matrix. Each pixel area includes a thin film transistor as a switch device, a pixel electrode for controlling the arrangement of liquid crystals, and a common electrode. The gate line corresponding to the gate electrode of the thin film transistor of each pixel is electrically connected or integrally formed, and the data line corresponding to the source electrode is electrically connected or integrally formed. The pixel electrode corresponding to the drain electrode is electrically connected or integrally formed. The following description is mainly for one or more pixel areas, but other pixel areas can be formed as well.

  An embodiment of the present invention provides an array substrate, as shown in FIG. The array substrate 100 includes the following: a base substrate 4, a gate line (not shown) provided on the base substrate 4, and a data line 1 provided perpendicular to the gate line. The gate line and the data line 1 intersect to define a plurality of pixel areas, and a multidimensional electric field is combined with the thin film transistor (not shown), the pixel electrode 3, and the pixel electrode 3 in the pixel area, respectively. Is provided. In this embodiment, the pixel electrode 3 is a plate-like electrode and has no slit. The common electrode 2 is a slit electrode and forms a plurality of slits 21. A first insulating layer 5 is provided between the common electrode 2 and the pixel electrode 3. One end of the plate electrode pixel electrode 3 covers the upper side of the data line 1, and the pixel electrode 3 A second insulating layer 6 is provided between the layer where the data line 1 is located and the layer where the data line 1 is located.

  In the normal pixel structure, the pixel electrode and the data line do not overlap with each other, because in the overlapping design, the interference with the pixel electrode of the data line is large. Therefore, in order to avoid the interference with the pixel electrode of the data line, it is generally necessary to use a resin material as an insulating layer, that is, the layer where the pixel electrode 3 is located. In addition, a single resin layer is provided between the layers where the data line 1 is located for isolation.

  In the prior art configuration shown in FIG. 1, the common electrode is used to completely cover the data line, or a relatively large area on the data line is occupied by the common electrode, thereby losing the transmittance at the position of the data line. The Therefore, in the array substrate provided in this embodiment, one end of the pixel electrode covers the data line (the common electrode is also above the data line), and the layer where the pixel electrode is located and the data line are located. One insulating layer can be provided between the layers to be used for insulating protection. This not only suppresses interference with the adjustment of the liquid crystal above the data line, but can also increase the formation range of the multidimensional electric field, increase the adjustment range of the liquid crystal in the pixel, and further improve the transmittance. It was.

  Further, the second insulating layer 6 is, for example, a resin layer, and can prevent interference with the pixel electrode of the data line. That is, one resin layer is provided between the layer where the pixel electrode 3 is located and the layer where the data line 1 is located. For example, the common electrodes 2 are arranged at equal intervals, and slit- or plate-shaped common electrodes are provided at equal intervals in the pixel. It should be explained that since the upper side of the data line is covered with the pixel electrode, the load of the data line is basically not affected regardless of whether the common electrode is crossed or not crossed above the data line. The influence on the load on the data line is mainly because a capacitor is formed between the data line and the pixel electrode, which can be improved by using a relatively thick resin material as an insulating layer. In the technical configuration of this embodiment, the bottom plate-like pixel electrode and the upper slit common electrode form a multidimensional electric field, and the upper common electrode and the bottom pixel electrode are separated by an insulating layer, that is, a first insulating layer. The data line is covered at one end of the pixel electrode, and a resin layer is provided between the layer where the pixel electrode is located and the layer where the data line is located, that is, the second insulating layer, which is used for insulation protection. Is. The method of the present embodiment not only suppresses interference with the liquid crystal above the data line, but also widens the formation range of the multidimensional electric field, expands the control range of the liquid crystal in the pixel, and further increases the transmittance.

  The distinction between Example 2 and Example 1 is as follows. The common electrode is a plate electrode, and the pixel electrode is a slit electrode. One end of the common electrode of the plate electrode is covered above the data line, and a second insulating layer is provided between the layer where the common electrode is located and the layer where the data line is located, and the pixel electrode of the slit electrode Is formed on the common electrode, and a first insulating layer is provided between the common electrode.

  Therefore, the array substrate provided by the present embodiment covers one end of the common electrode above the data line (similarly, the pixel electrode is located on the data line), and the layer where the common electrode is located and the data line One insulating layer is provided between the existing layers and used for insulation protection. This not only suppresses interference with liquid crystal adjustment above the data line, but also widens the formation range of the multidimensional electric field, increases the adjustment range of the liquid crystal in the pixel, and further increases the transmittance.

  The embodiment of the present invention further provides a liquid crystal panel. As shown in FIG. 3, the liquid crystal panel of one example of the embodiment includes a color filter substrate 100, an array substrate 200 described in the first embodiment, and a liquid crystal layer 10 between the array substrate 200 and the color filter 100. Is provided.

  The color filter 100 includes: a base substrate 7, a black matrix 8 formed on the base substrate 7, and a color resin 9 formed between the black matrices 8, and the black matrix 8 is formed on the array substrate 200. This corresponds to the position of the gate line, the position of the thin film transistor, and the position where the data line between adjacent pixels is not provided. The black matrix 8 of the color filter substrate defines a plurality of sub-pixel areas, and each sub-pixel area includes a color resin 9, and the color resin 9 includes, for example, a red resin, a green resin, and a blue resin. Green and blue (RGB) subpixels are obtained. The subpixel area on the color filter substrate 100 corresponds to the subpixel area on the array substrate 200.

  The array substrate 200 and the color filter substrate 100 form a liquid crystal cell so as to face each other, but the liquid crystal material is filled in the liquid crystal cell to obtain the liquid crystal layer 10, thereby obtaining a liquid crystal panel. The pixel electrode and the common electrode in each pixel area of the array substrate 200 are for performing display operations by applying an electric field to control the degree of rotation with respect to the liquid crystal material. In these examples, the liquid crystal display further includes a backlight source that provides backlight to the liquid crystal panel.

  In the array substrate shown in FIG. 1, a relatively wide common electrode structure is provided above the data line 1, and the area covered with the common electrode does not have optical transparency. In comparison, in the array substrate 200 of the present embodiment, the upper side of the data line 1 is covered with the pixel electrode 3, so that only the data line 1 is opaque to the light. In addition to eliminating the interference with the liquid crystal electric field, the range of liquid crystal light adjustment is further expanded. Further, the liquid crystal corresponding to the upper area of the data line 1 covered by the pixel electrode 3 can be driven normally. Therefore, it is necessary to provide the black matrix 8 at the corresponding position of the color filter substrate above the data line 1. Absent. As described above, the black matrix 8 is provided between adjacent pixels, and the area occupied by the black matrix 8 is reduced, thereby increasing the adjustment range of the liquid crystal in the pixel and further improving the transmittance.

  A liquid crystal panel according to another embodiment of the present invention includes a color filter substrate, the array substrate described in embodiment 2, and a liquid crystal layer disposed between the array substrate and the color filter substrate.

  The embodiment of the present invention provides a method for manufacturing the array substrate described in the embodiment. The method includes:

  Step 101: forming a gate line, a data line, and a thin film transistor on a base substrate, connecting the gate electrode of the thin film transistor to the gate line, and connecting the source electrode to the data line.

  In step 102, a second insulating layer is formed on the gate line, the data line, and the thin film transistor base substrate.

  Step 103: A plate-like electrode is formed on the base substrate on which the second insulating layer is formed.

  Step 104, on the base substrate on which the plate-like electrode is formed, there is a slit-like electrode that generates a multi-dimensional electric field in combination with the plate-like electrode, and between the slit-like electrode and the plate-like electrode, One insulating layer is formed.

  The slit electrode is a pixel electrode, the plate electrode is a common electrode, or the plate electrode is a pixel electrode, the slit electrode is a common electrode, and one end of the plate electrode is the data Cover the top of the line.

  For example, the slits of the slit electrode are arranged at equal intervals.

  The embodiment of the present invention further provides a method of manufacturing a color filter, which includes the following.

  Step 201: forming a black matrix and a color resin on a base substrate, wherein the black matrix corresponds to a position of a gate line on the array substrate, a position of a thin film transistor, and a position where a data line between adjacent pixels is not installed. Is.

  It should be explained that in the embodiments of the present invention, the method for manufacturing the color filter substrate has many examples. For example, the color resin is formed first, and then the black matrix is formed. Alternatively, a black matrix is formed first, and then a color resin is formed. The present embodiment does not limit this.

  The black matrix of the color filter substrate defines a plurality of subpixel areas, and each subpixel area includes a color resin, and the color resin includes, for example, a red resin, a green resin, and a blue resin, thereby red, green, and A blue (RGB) subpixel is obtained. The sub-pixel area on the color filter substrate corresponds to the sub-pixel area on the array substrate.

  A liquid crystal cell is formed so that the array substrate and the color filter substrate face each other, and the liquid crystal cell is filled with a liquid crystal material, thereby obtaining a liquid crystal panel. In these examples, the liquid crystal display further includes a backlight source that provides backlight to the liquid crystal panel.

  The embodiment of the present invention can be further modified. For example, the plate-like electrode can be a common electrode and the slit-like electrode can be a pixel electrode, and a multidimensional electric field only needs to be formed between the two. The electrode covering the data line is not necessarily manufactured after the gate line, the gate electrode, and the thin film transistor are formed. For example, in the case of a top gate type thin film transistor, a gate line and a gate electrode are finally manufactured. Therefore, it is only necessary to form a thin film transistor that can be driven normally, to ensure that there is insulation protection above the data line, and to form a multidimensional electric field.

  Embodiments of the present invention further provide a display, such as a liquid crystal display, liquid crystal television, electronic paper, digital frame, etc., including the array substrate described in the previous embodiments. When the display substrate is, for example, a liquid crystal display, it includes a liquid crystal panel, and the liquid crystal panel includes an array substrate, a color filter substrate, and a liquid crystal layer positioned between the array substrate and the color filter substrate.

  The above description shows only specific embodiments of the present invention. However, the scope of protection of the present invention is not limited to this, and the technical scope disclosed by the present invention can be obtained by an engineer familiar with any technical field. Of these, any change or alternative that can be easily conceived falls within the protection scope of the present invention. Therefore, the protection scope of the present invention is based on the protection scope of the claims.

1 data line 2 common electrode 3 pixel electrode 4 base substrate 5 first insulating layer 6 second insulating layer 7 base substrate 8 black matrix 9 color resin 10 liquid crystal layer 21 slit 100 color filter substrate 200 array substrate

Claims (9)

An array substrate,
Base substrate,
A gate line installed on the base substrate,
A data line installed perpendicular to the gate line;
A pixel area defined by intersecting the gate line and the data line;
In the pixel area, a thin film transistor and a pixel electrode, a common electrode that forms a multidimensional electric field in combination with the pixel electrode is provided,
The pixel electrode is a plate electrode and the common electrode is a slit electrode,
A first insulating layer is provided between the common electrode and the pixel electrode,
Here, one end of the plate electrode covers the upper side of the data line, a second insulating layer is provided between the layer where the plate-like electrode is located and the layer where the data line is located ,
The array substrate, wherein the slit electrode covers the data line .   The array substrate according to claim 1, wherein the second insulating layer is a resin layer made of a resin.   The array substrate according to claim 1, wherein the slits of the slit electrode are arranged at equal intervals. Forming a gate line, a data line, and a thin film transistor on a base substrate, the gate electrode of the thin film transistor being connected to the gate line, and the source electrode and the data line being connected;
Forming a second insulating layer on the base substrate on which the gate line, the data line, and the thin film transistor are formed;
Forming a plate-like electrode on the base substrate on which the second insulating layer is formed;
On the base substrate on which the plate electrode is formed, a slit electrode that forms a multi-dimensional electric field is formed in combination with the plate electrode, and a first insulating layer is provided between the slit electrode and the plate electrode. Providing, and
The plate-like electrode is a pixel electrode, the slit-like electrodes are common electrodes, one end of the plate-shaped electrode is not covered with the data line upward,
The method of manufacturing an array substrate, wherein the slit electrode covers the data line . The method according to claim 4 , wherein the second insulating layer is a resin layer made of a resin. The method according to claim 4 or 5 , wherein the slits of the slit electrode are arranged at equal intervals. To any of claims 1 to 3 including an array substrate according display device. The display device according to claim 7 , wherein the display device is a liquid crystal display and further includes a color filter substrate. The color filter substrate includes a black matrix and a color resin formed between the black matrices, and the black matrix includes a gate line position of the array substrate, a thin film transistor position, and a data line between adjacent pixels. The display device according to claim 8 , wherein the display device corresponds to a position that is not.

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